Vlc-based video frame synchronization

A technology of video synchronization and video frame, applied in the direction of synchronization by photonic/optical means, TV, color TV, etc., can solve the problem of inability to identify marks and other problems

Active Publication Date: 2017-09-26
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution does not recognize the marker if the user device is focusing on a different part of the event

Method used

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  • Vlc-based video frame synchronization
  • Vlc-based video frame synchronization
  • Vlc-based video frame synchronization

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0038] The same reference numerals are used throughout the drawings for similar or corresponding elements.

[0039] This embodiment relates generally to video frame synchronization, and in particular, to the synchronization of video frames originating from multiple user devices recording a scene.

[0040] Thus, these embodiments enable video frame synchronization for video streaming of multiple user devices, for example in connection with social events such as games or concerts. As a result of video frame synchronization, video guidance and rich content propositions can be made by providing video of events from different viewpoints corresponding to the user's position relative to the recorded scene.

[0041] The video frame synchronization of an embodiment is even capable of synchronizing video frames originating from user equipment which may belong to and thus be connected to different access networks. Thus, such video frame synchronization is possible even if some user equi...

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PUM

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Abstract

A VLC signal representing an alignment identifier is detected by cameras (4) of multiple user devices (1, 2, 3) filming a scene. Encoded video frames (91, 92, 93) from the user devices (1, 2, 3) are decoded and light patterns representing the captured VLC signal are identified in at least some of the video frames following decoding. The light patterns are decoded into alignment identifiers that are used in order to time align video frames (91, 92, 93) from different user devices (1, 2, 3) to thereby achieve video frame synchronization of video data from multiple user devices (1, 2, 3) recording a scene. The embodiments thereby enable video frame synchronization without the need for accurate clock synchronization between the user devices (1, 2, 3) and a video synchronization system (10).

Description

technical field [0001] This embodiment relates generally to video frame synchronization, and in particular, to the synchronization of video frames originating from multiple user devices recording a scene. Background technique [0002] Advances in high-speed mobile internet and the capabilities of user devices such as cell phones, smartphones, and tablets have brought about new ways to consume mobile live video streaming services. There is also a strong need for users to film social events, such as football games or music festivals, to present their own version of the story. Emerging applications allow users to collaboratively use multiple mobile cameras to produce video in a manner similar to producing professional live TV. Such as figure 1 As shown, the scenario includes three user roles, namely, Producer, Director and Consumer. Producers are users with user equipment 1 , 2 , 3 that collaborate to record and stream a video feed, eg in a stadium, to an application server ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/04H04B10/116H04N21/242H04N21/43H04N21/8547
CPCH04B10/116H04N5/04H04N21/242H04N21/43H04N21/4302H04N21/8547H04B10/516H04L7/0075H04N5/0675
Inventor 王乐米连科·奥普塞尼查托马斯·梅克林海迪-马利亚·贝克
Owner TELEFON AB LM ERICSSON (PUBL)
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